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Select the correct statement :...

Select the correct statement :

A

Black jack is ZnS.

B

Sulphide ores are concentrated by floatation method.

C

Parke’s process is based on distribution principle.

D

All are correct

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-METALLURGY-EXERCISE 2 (LEVEL - I)
  1. Which of the following statement(s) is/are incorrect?

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  2. Si and Ge used for semiconductors are required to be of high purity an...

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  3. In electrorefining of metals anode and cathode are taken as thick slab...

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  4. Select the correct statement :

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  5. The metal for which, its property of formation of volatile complex is ...

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  6. Match List-I with List-II List-I(Property) I Explosive II Self-...

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  7. A metal has a high concentration into the earth crust and whose oxides...

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  8. The process, which does not use a catalyst is

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  9. Refractory materials are generally used in furnaces because

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  10. % of silver in ‘german silver’ is :

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  11. Modern method of steel manufacturing is :

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  12. When an impurity in a metal has greater affinity for oxygen and is mor...

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  13. The chemical process in the production of steel from haematite ore inv...

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  14. "Fool's gold" is:

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  15. During electrolytic reduction of alumina, two auxillary electrolytes X...

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  16. For extraction of sodium from NaCl, the electrolytic mixture NaCl + KC...

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  17. A solution of Na2SO4 in water is electrolysed using inert electrodes....

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  18. Which of the following statements is correct regrading the slag obtain...

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  19. (viii) Amongest the following groups of oxides, the group containing o...

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  20. The benefication of the sulphide ores is usually done by:

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